Metal-reducing machine.



B. M. W. HANSON.

METAL REDUGING MACHINE.

APPLICATION FAILED 14.13.23, 190s.

Patented May 18, 1909.

2 SHEBTS-SHIQET 1.

B. M. W. HANSON.

METAL RBDUGING MACHINE.

APPLICATION FILED MAB.. 23, 1908.

921,986. 'Patented May 18, 1909.

S SHEET 2 JIP/Hanson fy/zzs Attori: cys,

:as co., wmsumam '1 p 5 State of Connecticut,

5 in the following description 55 geously used for the purpose.

BENGT M. W. HANSON, OF HARTFORD,

COMPANY, OF HARTFORD, CONNECTICUT, A

CONNECTICUT, ASSIGNOR TO PRATT & WHITNEY CORPORATION OF NEW JERSEY.

IIIETAL-REDUCING MACHINE.

Application filed March 23, 1908.

T o all whom it may concern.'

Be it known that I, BENGT a citizen of the United States, residing at Eof grinding Hartford, Hartford and have invented certain new and usefulImprovements in Metal-Reducing Machines, of which the following is aspecification.

.in the county of Specification of Letters Patent.

Patented May 18, 1909.

Serial No. 422,804.

the present case is supported by the slide 3 M. YV. HANSON, l while thetool which may be a suitable form device is supported by the slide 4.These slides may be of any suitable character so that a detailed them isnot deemed necessary. It might be remarked, however, that during theaction of the machine, the slide 4 moves in a plane at This inventionrelates to metal reducing an obtuse angle to the plane of movementmachines.

A machine embodying my invention may be employed with utility in manydifferent conneetions. I have found it of particular advantage ingrinding tools having beveled cutting edges at an angle to each other.As a type of such a tool may be mentioned what is known as a fish-tai 7cutter. kind of a device has four of such beveled edges or faces and itis one of the primary purposes of my invention to so organize themachine that these faces can be ground with precisionized accuracy. Themachine possesses other advantageous points which with the foregoingwill be set forth at length wherein is outlined that form of embodimentof the invention which I have selected for illustration in the drawingsaccompanying and forming a part of this specification.

Referring to said drawings, Figure 1 is a top plan view of a machineincluding my invention. Fig. 2 is a vertical section of a standard, andcertain indexing and gage means sustained thereby, portions of said twomeans being in elevation. Fig. 3 is a transverse section. on

This l the line 3-3 Fig. 2.

Figs. 4 to 7 inclusive are diagrammatic views l showing the differentpositions of the cutter, etc., and all of which will he hereinafter morefully described. Fig. 8 is a face view of an index member, and a portionof the gage means, the latter being in dottedlines.

Like characters refer to like parts throughout the several figures.

The different parts of the machine may be carried upon any suitableframework; latter illustrated involves a base or bed as 2. On the saidbase or bed are mounted a plurality of carriers, with one of which thework is connected and with the other of which the working-tool isconnected. These carriers are preferably movably mountedL and while theymay be of any desirable nature slides as 3 and 4 may be advanta- Theworkin the as of the slide 3, this being for the purpose of securing themovement bodily of the grinding tool along angular paths relative to theaxis of the work support. In the present case the slides are movedmanually and any known means may be provided for this purpose. Forinstance a feed-screw as 5 (see dotted lines Fig. l) can be employed forreciprocating the slide 3, said screw being provided at its outer endwith a hand-wheel as 6 to facilitate its being turned. The slide 4 maybe operated by a hand-lever as 7 operatively connected therewith.

I have represented the slide 3 equipped with an upright or standard as8. Through the upper portion of this standard 8 there is illustrated asextended a work-support which may consist of a spindle as 9. The spindle9 is rotary for a urpose that will hereinafter appear, and it 1srepresented as bored to receive the split-sleeve or divided bushing 1()into which the shank or body of the work fits. The shank of a fish-tailcutter is gen erally cylindrical and therefore the sleeve or bushing l()is of a corresponding internal shape. Through the forward end of thespindle 9 is tapped a screw as Il, the inner end of which is adapted tobind against said bushing or sleeve so as to cause the latter to tightlyand firmly hold the cutter, blank or work in position during thegrinding operation. It is therefore clear that the work or fish-tailcutter blank is solidly clamped in position and against movementrelatively to its supporting spindle 9.

In conjunction with a work-support such 9 I provide an index member, andwhile this index member may be of any suitable kind, I find that acircular plate or disk as 12 is advantageous. The index member or disk12 is in the present work support or spindle 9 and for this purpose itmay be keyed or otherwise suitablyV fastened thereto; There is combinedwith this index member a stop and in like manner this stop may be of anysuitable form; for

description of case rotative with the 'i different positions, and when afish-tail cutter instance I have found a plunger as 13- as. meeting thenecessary conditions. 'his plunger 13' is preferably yieldingly mounteditis shown as seated in a bore 14 in the standthe stop or plunger 13,'

ard 8 and as normally urged outward by a' coiled push-spring as 15seated in said and the ends of which respectively bear against thebottom of the bore and the tail of the plunger. In the present case thisindex member is capable of occupying several is being' ground thesepositions will' be fol'ir 1n number as will' hereinafter appear. Saidindex member 12 and its the different adjusted positions thereof andassure also the correct angula'rpresenta'tion' bush-ing of the work tothe koperating tool. ALs will hereinafter appear l d'o not rely uponguess# work or mere speculation to obtain a definite or precisioniz'edrelation between' the work and the index member of whatever' characterthelatter may be, buit provide means of a positive nature to, obtainthis important result so that the finished or ground fish' tail cutterwill be precise in form.

VA fish tail cutter has in addition to' the shank to which I havereferred, a head and it is the ylatter that has the fish-tail form. InFigs. 4 and 5 I have shown such a head, it being denoted by 16' andl'iaving inuit a Vfshaped notch or aperture 17, the walls of which areop'po'sitely inclined to each other; in fact the surfaces of these two'walls' in' a finished tool are at a right angle to eachother. When thesewalls or surfaces are ground down there will be produced as will beebvious two cutting edges or portions. In action these two surfaces areground in succession and afterward the outer or forward ends or tips ofthe two sides 18 and 19 o'f the flatheaded cutter ground along planes atright angles to' each other and of different pitch than the otherangles. There are thereifo're four surfaces to be g'roimc'l ona blankand it is the office of the index member 12 in connection with its stopto obtain the correct angular presentation of the work or blank to the`g'rindir'lg tool. s

The index member 12 to adapt it to' the work set forth has four seatsinto which the stop or plunger is adapted to be' interchange` ablyfitted, and these seatsmay consist of holes as 20, 21, 22v and 23 whichare' arranged as will be evident in pairs, the holes 20 and 21 beingcomplemental to leach other and the same applying to the holes 22 and23. It will be seen that the holes of the two pairs are diametricallyopposite to each other. y In grinding along the surfaces'y of the wallsof the notch l17 the holes 20` and 21 are employed while for grindingthe outer or tip' portions of the blankor work, theholes 2'2' and23 areused. Y The hole 2O'l is preferably initially` employed and the gagemeans to which I have bore cooperating stop invention the correctmaintain the workesupport or spindle 9' iny tained' by hereinbeforebriefly referred and which will be more fully alluded to hereinafterinsures a definite relation between this hole 2O and in fact after thesaid gage means has performed its function all of the holes will be in adefinite relation with the said stop. I might explain that in grind--ing a cutter of the kind. referred to the same is presented atan angleto the grinding tool; this angle should always be uniform with respecttothe relative tothe work-support. `"vflithout gage means such as thatcomprehend'ed by my angle cannot be obthe mere insertion of the shank ofthe fish-tail cutter blank into the sleeve or 10 or other'part whichdirectly holds the work said gage means however assures the accuracy ofsaid angle. Initially or prior to grinding the first surface of theblank the gage means is employed and after the definite relation betweenthe index member andY its coacting stop is thus fixed' it is notnecessary to' thereafter employ the said gage means'. Iii/hen ajsecondblank however is mounted in place, the gage means will be utilized. s

The index member or disk 12 may be ro= tated in any suitable manner, forexample by a knob' as 24 fastened by a pin or otherwise to the outer endof the work-supporting spine dle 9.l When the' index member is turnedthe spindle 9 is rotated simultaneously there-v with. The power of thespring 15 is just sufficient to" prevent accidental turning movement ofthe index-member'12 although its stress is not enough to prevent free'turn'- ing of said index member by an operator or attendant of themachine. By turning the index member by hand the plunger 13 is caused torecede out of an opening or hole in which it may be' seated, and whenthe index member has been given the' requisite motion said plunger'.will be shot into another cfsai'd openings or holes by the power of itsspring. Y

On the slide 1 is a suitable bearing as 25 and in the same is rotativelydisposed a shaft as 26 to the inner end of which is repreV sented asattached a grinding wheel as 27 while to the outer end a band-wheel orpulley as 23may be fixed to rotate said shaft and thereby the Vgrindingtool carried thereby. The grinding tool is of frusto-conical or ta-Apered form peripherally.

The slide 4 has two different characters of movement, one a limitedmovement or when forth the means illustrated for accom lishine theseresults.

At this point I might state that when the grinding tool has bottomedagainst the notch or for instance when it encounters one wall of saidnotch after having ground the other wall thereof, it is necessary l 3 0that further advancing motion of the slide 4 be positively arrested toprevent injury to the work or the cutting or nicking of the surface ofsaid notch which is not then being ground.

Gn the bed or base mounted an endwise movable bolt 29 which constitutesa suitable limit stop for the slide 2 l have shown as l 4 and this stopcooperates with a stop as 222() on the slide, the stop 39 being shown asa screw tapped through the outer end of said l slide, the bore whichreceives said screw intersecting or being in communication with l thatin which the stop-bolt 29 is fitted. lt I will be seen that these twostops are shown at right angles to each other. Should it be desired tolimit the advancing movement of the slide 4 the bolt 29 is pushed inwardand across the path of the screw 30 and when the screw strikes the boltthis will indicate to the operator to release the lever. As the screw isadjustable l can by its operation regulate the time or point ofengagement between the same and the bolt to adapt the machine toeffective operation upon different size blanks. By pulling the bolt backout of the path of movement of the screw as represented in Fig. 1 theadvancin motion of the slide 4 will be not limited or the maximum feedof the said slide can be obtained.

l will now describe the gage means shown in the drawings. Said gagemeans includes in its make up a gage or finger as 31, the shank of whichis extended upward through and is fastened in a hole or perforation inthe outer end of the block 32. T his gage or iinger 31 has its lower endflat and at a desired angle to its longitudinal axis, the angle beingsuch a one as will adapt the to the particular work to be donc. Saidlower, flat end is adapted to engage one of the flat faces of the headof the work or blank. The block 32 is preferably adjustable verticallyof a support or pin as 34 and in a bore in said block is fitted afriction shoe as 35. There is also located in said bore a push-spring as36, acting against said shoe to constantly or at all with thc blank, theplunger 13 at this times force the same in an outward direction wherebysaid shoe is caused to engage the support or pin with a pressuresufficient to maintain the block in a vertically adjusted position. Theblock and gage carried thereby of course partake of therotary movementof the work support 9 and the index member 12 and they can be readilyraised or lowered. to adapt them to the thickness of the work. llrhenthe gage has exercised its function as such it can be swung back out ofthe way about the support or pin 34 as a pivot. (See Fig. 1).. The'gage. is shown as occupying` its operativo position in Figs. 2 and 8.

ln the operation of the machine, the slide 3 will if necessary beadvanced to such a position as to cause the operation of the grindingwheel 27 upon the work, after which the l shank of the latter will beclamped in the split bushing or sleeve 10, thc slide 4 being at thistime in its backward or retracted position. The block 32, if it be swungback out of the way, will now be moved forward into line with thespindle 9 and the lower flat edge or end of the 31 will be moved intocontact upper fiat face of the head 16 of the time being in any one ofthe four holes 20, 21, aiu The simple solid engagement of the wor1 g orlower end of the gage puts the work into a definite angular relationwith respect to the work support 9 and also of the index inember 12; thework therefore is primarily indexed with respect to the index member andin this way l. assure a certain or known relation between the work andthe index member and precision in operation while the different angularfaces are being ground. After the work and the work support or gage areadj usted relatively to each other by the use of the gage means, thework will be in readiness to have its first surface dressed off orground. ln the present case the wall of the notch or aperture 17, on theleft in Figs. 4 and 5 is first ground. Vf hen this wall is finished thespindle 9 is given one half turn so as to exactly reverse the positionof the work. ln grind- 'ing the first wall of the two the plunger 13will be in the hole 20. When the second surface is to be ground theindex member 12 is turned so as to bring the opening 21 opposite theplunger 13 at which point the tip or forward end of said plunger is shotinto said opening 21 by the power of the spring 15. The index membertherefore in connection with its cooperating and relatively fixed stopassures the correct presentation successively of different lt will beevisurfaces to the grinding tool. dent that during the grinding of thetwo surfaces of the notch 17, the slide 3 is at rest and that the slide4 is being reciprocated by hand, and that further the slide 4 has alimited forward stroke as previously set forth. ilhen the walls of thenotch 17 are dressed down to the required extent, the bolt 29 will beretracted and the index member 12 will be turned to permit theprojection of the outer end of the plunger 13 into the hole 22 to dressdown one of the tip portions of the blank during which action the slide4 is being reciprocated. TWhen this particular tip portion has beensufficiently ground, the index member 12 will be given a half turn attime the outer end of the plunger will be forced into the opening 23 tomaintain the correct angular position between the work which and thegrinding tool when the last of the sition of the tool with respect tothe work in making; the inner and outer dresses or those along` theWalls of the notchA 1-7 and the tip portions 18 and 19 of the work.

As hereinbefore indicated one forni of embodiment oi the inventiony hasbeen illustrated and described, this being toenable those skilledy inthe'art to'practiee' the invention. As will be obvious my invention canbe incorporated in different kinds of maehinery, but when embodiedin ametal WorkF ing or reducing machine it is not essential that the'workacted'upon'be a fish-tail cutter.

Vfhat I claim is:

1. In a machine of the elass described, a manually-operable slide havinga stop, and a stop supported independently oi'l the first mentioned stopand movable into and out of the path of the latter.

2. In a machine of the class described, a

2 Oreeiprocatory slide', a= stop earried by said slide,. and a secondstopfsupported independ#l ently of the iirst mentionedstop and movableinto-and out of the path of the latter.

31. Inv a machine of the class described, al

slide, an adjustable stop carried by said slide, and a stopl supportedindependently of the iirst stopV and movable intol and out of the pathof the latter.

4. In a machine of the class described, a slide, a screw adjustablycarried by said slide and constituting a stop, and a bolt supportedindependently of the slide and movable into-

